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Hi everyone! I'm dropping in from the States as we're finalizing a cool project some of you running or thinking about running auxiliary / methanol injection might be interested in. Please excuse some of the "US-centric" rhetoric from the below copy/paste from my original post on RX7Club.com. If you are interested in one of these, please reply here or on the original post.
As some of you may know, Euro spec and some Canadian spec FDs came from the factory with a larger washer tank, mounted in the rear hatch, behind the plastic panel. The reason for the larger tank was to feed three thirsty systems; the front washers, the rear washer AND the headlight washers (which US cars didn't get). Capacity on this tank is a little over 1.5 Gallons (5.5 Liters) which makes it a GREAT option for a stealthy methanol / auxiliary injection tank.
Euro Tank Mounted
US spec models with rear wipers have a small reservoir in that spot - but the capacity doesn't instill a lot of other uses.
"cute"
The good news is: all FDs have the necessary mounting points and provisions to support the larger tank.
The problem is: finding Euro spec washer tanks. They simply aren't readily available, they are NLA from Mazda and they come with their own share of downsides if we're being perfectly honest.
"Wait a minute... downsides?"
Yeah. There are a few downsides to the Euro washer tank in it's current form.
1) Since the tank is made to house three pumps, that does two things. It eats up internal capacity and has potential areas that can leak:
2) Since the tank is a two-piece design, it has a weird rubber connector between the two tanks. Again, eats up internal capacity and has another potential leak area:
3) There are sensors and hose routing that take capacity and just aren't needed:
4) They don't really have a natural place to add fluid level sensors or nozzles. Most tanks I've seen have even MORE holes drilled to accommodate these guys.
5) It's not cheap. I've seen these sell for over $400USD in old, beat up condition.
So that's the bad news. But the GOOD news is, we've 3D scanned a Euro tank, made modifications in CAD and found a manufacturer to make these. We've addressed the potential issues and made this the best version of rear Euro washer tank that we could.
FRONT
REAR
TOP
BOSS DETAIL
REAR LEFT
REAR RIGHT
FEATURES OF NEW TANK
* Redundant systems, leak points and sensors have been deleted
* Design is now one piece to increase capacity and ease install
* Capacity should be right around 2 Gallons (7.5Liters)
* It will bolt in requiring zero modification
* It should be "agnostic" to whatever injection kit you run
* We provide a large boss for a level sensor as well as a smaller boss for a nozzle on the side of the tank, with an additional three nozzle bosses to accommodate multi-nozzle setups. Each boss would have to be drilled/tapped for your own sensor/nozzle.
Now the only remaining question is: does anyone want this? Tooling costs are not cheap and minimum orders are not low. So this can only really happen if there's real interest. Prices can't be discussed in an interest thread - but it would be around 1/2 the price of used units - but that also depends on how many people commit.
If you're interested, add your name below. If you have questions, by all means ask away. If you can share this on social media / other forums to drum up some interest - that'd be great too. The more interest, the more likely this happens and the lower the price will be.
LINK TO THE ORIGINAL POST / INTEREST LIST: https://www.rx7club.com/group-buy-product-dev-fd-rx-7-269/fd3s-rear-euro-washer-fluid-tank-1116357/#post12198009